Electrical characteristics (continued) – Rainbow Electronics MAX15051 User Manual
Page 3
MAX15050/MAX15051
High-Efficiency, 4A, 1MHz, Step-Down Regulators
with Integrated Switches in 2mm x 2mm Package
_______________________________________________________________________________________
3
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
EN
= 5V, C
VDD
= 2.2µF, T
A
= -40°C to +85°C, typical values are at T
A
= +25°C, unless otherwise noted.) (Note 4)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
COMP
COMP Clamp Voltage High
V
DD
= 2.9V to 5V, V
FB
= 0.5V, V
REFIN/SS
= 0.6V
2
V
COMP Clamp Voltage Low
V
DD
= 2.9V to 5V, V
FB
= 0.7V, V
REFIN/SS
= 0.6V
0.68
V
COMP Slew Rate
V
FB
= 0.7V to 0.5V, V
REFIN/SS
= 0.6V
1.4
V/µs
COMP Shutdown Resistance
From COMP to GND, V
IN
= 3.3V, V
COMP
= 100mV,
V
EN
= V
REFIN/SS
= 0V
6
ERROR AMPLIFIER
FB Regulation Accuracy Using
External Resistors
0.594
0.6
0.606
V
Open-Loop Voltage Gain
115
dB
Error-Amplifier Unity-Gain
Bandwidth
26
MHz
Error-Amplifier Common-Mode
Input Range
V
DD
= 2.9V to 3.5V
0
V
DD
- 2
V
V
FB
= 0.7V, sink
1
Error-Amplifier Maximum Output
Current
V
COMP
= 1V, no switching,
V
REFIN/SS
= 0.6V
V
FB
= 0.5V, source
-1
mA
FB Input Bias Current
V
FB
= 0.7V
70
nA
REFIN/SS
REFIN/SS Common-Mode Range V
DD
= 2.9V to 3.5V
0
V
DD
- 2
V
REFIN/SS Charging Current
V
REFIN/SS
= 0.45V
6
8
10
µA
REFIN/SS Offset Voltage
V
REFIN/SS
= 0.9V, FB shorted to COMP
-4.5
+4.5
mV
REFIN/SS Pulldown Resistance
V
IN
= V
DD
= 3.3V, V
REFIN/SS
= 0.1V
300
LX (ALL BUMPS COMBINED)
LX On-Resistance, High Side
I
LX
= -500mA
V
IN
= V
BST
- V
LX
= 3.3V
24
54
m
LX On-Resistance, Low Side
I
LX
= 500mA
V
IN
= 3.3V
18
50
m
High-side sourcing
5.4
8
Low-side sourcing
7
Low-side sinking
7
Zero-crossing current threshold
0.2
Skip high-side sourcing
0.58
A
LX Current-Limit Thresholds
V
IN
= 3.3V
Sink current-limit DAC steps
4
Steps
V
LX
= 0V
-10
LX Leakage Current
V
EN
= 0V
V
LX
= 5V
10
µA
LX Switching Frequency
V
IN
= 3.3V
0.9
1
1.1
MHz
LX Maximum Duty Cycle
V
IN
= 3.3V
90
96
%
LX Minimum On-Time
V
IN
= 3.3V
80
ns
RMS LX Output Current
4
A
ENABLE
EN Input Logic-Low Threshold
(Falling)
0.7 V